Re: [Boost-users] BGL: write_graphviz_dp taking in count values of dynamic_properties

Subject: Re: [Boost-users] BGL: write_graphviz_dp taking in count values of dynamic_properties
From: Pablo Madoery (madoerypablo_at_[hidden])
Date: 2013-09-30 18:47:30

it works !!!.
The only change is the "<string>" template return parameter that must be
explicity gave
in dp.property("style",
boost::make_transform_value_property_map<string>(enable_to_style(),
get(&EdgeInfo::enable, graph)));

Thank you !!!

2013/9/30 Jeremiah Willcock <jewillco_at_[hidden]>

> On Mon, 30 Sep 2013, Pablo Madoery wrote:
>
>  Hi,
>> I have the following code that print a graph taking in count values of
>> dynamic_properties:
>>
>> #include<iostream>
>> #include <boost/graph/adjacency_list.**hpp>
>> #include <boost/graph/graphviz.hpp>
>>
>> using namespace std;
>> using namespace boost;
>>
>> struct VertexInfo
>> {
>>     int id;
>> };
>>
>> struct EdgeInfo
>> {
>>     double weight;
>>     bool enable;
>> };
>>
>> typedef adjacency_list<listS, vecS, bidirectionalS, VertexInfo, EdgeInfo>
>> Graph;
>>
>> int main()
>> {
>>     //////////////////////////////**//////////////////////////////**
>> //////////////////////////////**//
>>     Graph graph;
>>     Graph::vertex_descriptor a = add_vertex(graph);
>>     Graph::vertex_descriptor b = add_vertex(graph);
>>     Graph::vertex_descriptor c = add_vertex(graph);
>>     Graph::vertex_descriptor d = add_vertex(graph);
>>     Graph::edge_descriptor e1 = (add_edge(a, b, graph)).first;
>>     Graph::edge_descriptor e2 = (add_edge(a, b, graph)).first;
>>     Graph::edge_descriptor e3 = (add_edge(b, c, graph)).first;
>>     Graph::edge_descriptor e4 = (add_edge(c, a, graph)).first;
>>     Graph::edge_descriptor e5 = (add_edge(c, a, graph)).first;
>>     Graph::edge_descriptor e6 = (add_edge(c, d, graph)).first;
>>
>>     graph[e1].weight = 5;
>>     graph[e2].weight = 10;
>>     graph[e3].weight = 6;
>>     graph[e4].weight = 14;
>>     graph[e5].weight = 2;
>>     graph[e6].weight = 3;
>>
>>     graph[e1].enable = true;
>>     graph[e2].enable = false;
>>     graph[e3].enable = true;
>>     graph[e4].enable = false;
>>     graph[e5].enable = true;
>>     graph[e6].enable = false;
>>
>>     ofstream ofs("graph.dot");
>>     dynamic_properties dp;
>>     dp.property("node_id", get(vertex_index, graph));
>>     dp.property("label", get(&EdgeInfo::weight, graph));
>>     dp.property("taillabel", get(&EdgeInfo::enable, graph));
>>     write_graphviz_dp(ofs, graph, dp);
>>
>>     cout << "fin" << endl;
>>
>>     return 0;
>> }
>>
>> //////////////////////////////**//////////////////////////////**
>> ///////////////////////
>>
>> there is a property called "enable" in the edges that I print in the
>> tails of the arrows.
>> But what i really want is that when enable = false the style of the arrow
>> be different ("invis" for example). How can i do that?
>>
>
> Try something like this (not tested); be sure to include
> <boost/property_map/transform_**value_property_map.hpp>:
>
> dp.property(
>   "style",
>   boost::make_transform_value_**property_map(
>     enable_to_style(),
>     get(&EdgeInfo::enable, graph)));
>
> where enable_to_style is something like:
>
> struct enable_to_style {
>   std::string operator()(bool b) const {
>     return b ? "solid" : "invis";
>   }
> };
>
> -- Jeremiah Willcock
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